The highest court in the United States says Guantanamo prisoners cannot be tried in military tribunals because this would violate their basic human rights.
The ruling is a blow to President George Bush as it restricts his wartime powers. Responding to the decision, Bush said his next step would be to approach the U.S. Congress to seek its approval.
The case was brought by Salim Ahmed Hamdan, a Yemeni who worked as Osama Bin Laden's driver in Afghanistan
. He was held at Guantanamo
for four years and faced a single charge of conspiring against U.S.